The difference between positive thinking and faith lies in its reference. While positive thinking might motivate you to strive to become and to possess, the faith of God reveals who you already are by design, and what you already have by redemption through Christ. (quoted from Francois du Toit mirror translation notes on Hebrews)
God’s plan of redemption through Christ is so thorough and complete that He left nothing unfinished. God has restored us to His original design, through Jesus! Because of this, we lack nothing.
Psalm 23:1 The Lord is my shepherd I shall not lack… Also 3 John 2 beloved I would above all things that you prosper and be in health even as your souls prospers.
The more we hear about what Jesus completed for us, the more His faith rises in us, this beholding Jesus is what will cause our soul to prosper, and thus prosperity in every area of life.
Knowing we are always righteous and innocent in Him will surpass positive thinking and take you into the revelation of His grace, this revelation will cause you to be conscious of your righteousness instead of your sin or shortcomings.
Notice in 3 John 2 it says even as your soul prospers. In order for us to move in His prosperity and health, our soul needs to also prosper simultaneously and become more and more righteousness conscious. In this we learn who we already are by design, and what we already have by redemption through Christ.